How do you solve $3x^2-6=282$ ?

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Answer 1 · 2016-08-07T13:46:57

$x=+-4sqrt6$

$3x^2-6=282$
or
$3x^2=282+6$
$3x^2=288$
or
$x^2=288/3$
or
$x^2=96$
or
$x=sqrt96$
or
$x=+-4sqrt6$

Answer 2 · 2016-08-07T13:50:44

$x = +-4sqrt6$

Although this is a quadratic equation, there is no $x$ term, so we can use a different method of solving it without making everything equal to 0.

$3x^2 = 288$

$x^2 = 96$

$x = +-sqrt96$

$x = +-sqrt(2xx2xx2xx2xx2xx3)$

$x = +-4sqrt6$

How do you solve 3x^2-6=2823x^2-6=282?